package network;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;

public class UdpEchoServer {
    private DatagramSocket socket = null;
    public UdpEchoServer(int port) throws SocketException {
        socket = new DatagramSocket(port);
    }

    public void start() throws IOException {
        System.out.println("服务器启动！");
        while(true) {
            DatagramPacket requestPacket = new DatagramPacket(new byte[4096], 4096);
            socket.receive(requestPacket);

            String request = new String(requestPacket.getData(), 0, requestPacket.getLength());
            String response = process(request);

            DatagramPacket responsePacket = new DatagramPacket(response.getBytes(), response.getBytes().length, requestPacket.getSocketAddress());
            socket.send(responsePacket);
        }
    }

    public String process(String request) {
        return request;
    }

    public static void main(String[] args) throws IOException{
        UdpEchoServer server = new UdpEchoServer(10088);
        server.start();
    }
}
